Developing AEM Commerce projects based on Commerce Integration Framework (CIF) for AEM as a Cloud Service follows the same rules and best practices like other AEM projects on AEM as a Cloud Service as well. Please review these first:
1. AEM Project Structure
2. AEM as a Cloud Service SDK
3. AEM as a Cloud Service Development Guidelines
A local development environment is recommended to work with CIF projects. The CIF Add-On provided for AEM as a Cloud Service is available for local development as well. It can be downloaded from the Software Distribution portal.
The CIF Add-On is provided as a Sling Feature archive. The zip file available on the Software Distribution portal includes two Sling Feature archive files, one for AEM author and one for AEM publish instances.